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#include <iostream>
using namespace std;
 
struct A {
	int a1;
	int a2;
};
int main() {
	A *a;
	a = 0;
	delete [] a; 
	delete [] NULL;
	return 0;
}

In file included from /usr/include/_G_config.h:15:0,
                 from /usr/include/libio.h:32,
                 from /usr/include/stdio.h:74,
                 from /usr/include/c++/4.8/cstdio:42,
                 from /usr/include/c++/4.8/ext/string_conversions.h:43,
                 from /usr/include/c++/4.8/bits/basic_string.h:2815,
                 from /usr/include/c++/4.8/string:52,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/ostream:38,
                 from /usr/include/c++/4.8/iostream:39,
                 from prog.cpp:1:
prog.cpp: In function ‘int main()’:
prog.cpp:12:12: error: type ‘int’ argument given to ‘delete’, expected pointer
  delete [] NULL;
            ^

Standard output is empty